Pressure-governor



(No Mode l.)

R J. ST. MARY.

PRESSURE GOVERNOR. E

No. 558,999. Patented Apr. 28, 1896.

fig.- 2. I 8 wirnesaesz Iuu'enlbm AN DREW EGRAHAM.PHOTUU'I'KQWASHINGTON. D Cv NITED STATES PATENT OFFICE.

JOSEPH ST. MARY, OF SAN FRANCISCO, CALIFORNIA, ASSIGN OR TO J OHN O.WVINANS, OF SAME PLACE, AND PETER ST. MARY, OF PORTLAND,

OREGON.

PRESSURE-GOVERNOR.

SPECIFICATION forming partof Letters Patent N0. 558,999, dated April 28,1896.

' Application filed March 25, 1895. Serial No. 543,148. (No model.)

T0 on whom it may concern.-

Be it known that I, JOSEPH Sr. MARY, a citizen of the United States,residing in the city and county of San Francisco, State of California,have invented certain new and useful Improvements in Pressure'Governors;and I hereby declare the following specification and the drawingstherewith to constitute a complete description of my invention.

My invention relates to apparatus for the regulation of air-currents toor from steamfurnaces, also jets of steam and air to pro motecombustion, or the power applied to pumping apparatus.

My improvements consist in an actuating piston and cylinder, a flexibleplate or diaphragm, controlling and escape valves, and an adjustablecompensating spring, self-contained, set in alinement, and constructedin a simple form, attachable to a wall or post, as will be hereinafterpointed out in connection with the drawings, and set forth in the claimsat the end of this specification.

The principal object of my invention is to provide in a very simple andinexpensive form the various elements of a pressure-regulatingapparatus, with provision for endurance and safety from derangement inuse.

Referring to the drawings, Figure 1 shows the manner of connecting myimproved regulating apparatus to a pump so as to control its speed andwork from the resulting pressure. Fig. 2 is afront elevation of one ofmy improved regulating devices complete. Fig. 3 is a central section onthe line w 00 of Fig. 2.

Similar letters of reference are employed to indicate correspondingparts in the different figures of the drawings.

Referring first to Fig. 1, showing the manner of connecting myregulating device to a steam-supply valve, A is a common steampump, Bthe steam-supply pipe, and C the pump discharge-pipe.

operated by the lever K and a chain or cord I-I, passing over pulleys II to the movable or sliding weight J of the regulator D.

As the weight J is moved upward by pres sure in the pipes C and E actingon the piston b, which by means of the chain or cord 1-1 and the WeightLmoves the lever K, opening or closing the cock G accordingly, shuttingoff the supply of steam to the pumpingengine A. WVhen the weight J sinksby reason of diminished pressure in the pipe C, the weight J beingheavier than the one L, this latter weight and lever K are raisedandadditional steam supplied to the pumping-engine A, as the pressure inthe pipe 0 may determlne.

The application to a fine or chimney damper, ash-pitdoor,blowing-nozzles for furnaces,

and like purposes is the same as here repre sented, except as to themethod of connecting the weight J with the element to be moved, as willbe obvious from the case just described.

Referring now to the construction of the regulating apparatus D, (shownin the enlarged views, Figs. 2 and 3,) the main member M is providedwith a flange N, to be attached to a wall or post 0. Formed integrallywith this member M is a chamber or sleeve P, containing a coiled springQ, pressing at the top against a thin flexible plate R, and at thebottom resting on a follower S, adjustable up or down by the screw T, soas to regulate the force of the spring Q and the amount of pressurebeneath the plate R.

Attached to the member M by the bolts T and securing the flexible plateR, is an upper member U, containing a circular chamber V, an inletpassage and pipe E and outlet pipe and passage F, alsoasmall passage XV,leading upward into the tube or cylinder X, closed by a small pointedvalve Y, attached to the flexible plate R, as shown in Fig. 3.

The cylinder ortuloe X is attached to a nipple m on the member U and hasa close-fitting piston b therein, provided with a strong stem orpiston-rod Z, that extends upward, projecting to receive the annularsliding weight J. This weight J is provided with removable auxiliaryweights a, to increase or diminish the load on the piston 19, as theworking force may require.

The chamber V is constantly filled and sustains a static pressure fromthe fluid entering through the pipe and passage E, tending to depressthe flexible plate R against the pressure of the spring Q, and thus openthe valve Y, permitting the fluid to pass upward around the valve Y,through the small passage XV, into the cylinder or tube X beneath thepiston 7), raising the weight J by means of the stem Z, and acting on adamper, valve, or other element that generates or controls the pressurepassing through the pipe and passage E, as shown in Fig. 1

It the pressure in the chamber V falls below that imparted by the springQ, pressing beneath the flexible plate R, then this plate rises and thevalve Y is closed. The fluid contained in the cylinder X beneath thepiston I) slowly leaks out through the passage and pipe F, permittingthe weight J to descend and open a damper, valve, or other elementsupplying or controlling the pressure in the pipe and passage E and thechamber V. This leak of fluid from the cylinder X through the pipe andpassage F is controlled by a cock 0, (seen in Fig. 1,) so adjusted as tonot pass a quantity suflicient to interfere with the supply through thevalve Y when that is open, but to permit a slow escape of the fluid anddescent of the piston Z) and weight J when the valve Y is closed. Inthis manner it will be seen that the weight J will rise and fall as thepressure in the cylinder V is more or less, and that the degree ofpressure required to operate the apparatus is dependent upon the forceexerted by the spring Q, and is adjustable to any degree by means of thescrew T.

It will also be seen that the apparatus is applicable for regulation inany place where variable fluid-pressure is available as an actuatingforce, and when the supply of the generating element-whether air, steam,gas, or oilcan be controlled by movement of a piston subjected tovariations of pressure, and that my invention is applicable to dampers,ash-pit doors, waterpumps, and aircompressors.

Having thus explained the nature and objects of my invention and themanner of constructing and applying the same,what I claim as new, anddesire to secure by Letters Patent, is

1. In a fluidpressure-regulating apparatus, the combination with thebracket or wall plate adapted to be attached to the wall or a post, ofthe flexible plate, the spring-actuated inlet-valve operated thereby, aninlet-pipe, a horizontal fluid-escape passage between said inlet-valveand the weighted piston to control the fluid-pressure above saidinlet-valve, and the piston carrying adjustable weights and operating avalve, substantially as described.

2. In a fluid-pressure regulator, the combination with a bracket or wallplate provided with an integrally-formed sleeve or chamber adapted toreceive a spring, of a removable covering-head containing an annularchamber and inlet and outlet passages, an interposed flexible platecarrying aspring-pressed inlet-valve,and a weight-carrying pistoncontrolling the steam-pressure, substantially as and for the purposeherein set forth and described.

In testimony whereof I have hereunto affixed my signature in thepresence of two witnesses.

JOSEPH ST. MARY.

\Vitnesses:

ALFRED A. ENoUIsr, WILsoN D. BENT, Jr.

